Improvement in lubricators



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Letters Patent No. 92,131, dated Jane 29, 1869.

IMPROVEMENT 1N LUBRIcATons.

` The Schedule referred to-in these Letters Patent and making part ofthe raam` To whom. it may concern of two forms of my improvedlubricator; and

Figure 3 is a like section of the lubricator, and a mould for castingthe guard of soft metal which unites the different parts of which th'eiubricator is composed.

My invention relates Vto that class of inbricators consisting of a bulb,iu which the lubricant is held, and a stem, through which the lubricantis fed alltom-.ttically to the shaftiug or other mechanism; and

It consists ,of a lubricator, in which the bulb and the tube for holding:the tubular feed-stem are united by means of a fusible or soft metal,or-alloy, cast around the bulb-neck, which has formed upon itcorrngations or projections, constituting a holding-surface for themetal, or both around the neck and within the bulb, so that they shallbe upon the inside as well as the outside ofthe bulb.

A represents the glass bulb of the lubicator;

B is the tubular feed-stem;

a is the tube in which the stem is held; and

b is the guard of soft metal for holding the tube to the bulb.

The method of casting or running the soft-metal guard around the neck ofthe bulb and within the bulb, is illustrated in fig. 2, where C is thematrix, and D. the core for holding the tube in place during theoperation.

The core, in 'this instance, is hollow, in order to allow the escape ofthe air displaced by the entrance of thc metal which forms the buttonb', within the bulb. v

I needv not, however, further describe the manner of ibrmiug the button,as it has been fully set forth and claimed in my application for alubricator, which has recentlyY been allowed.

It will be lseen that the present guard surrounds, both on the'outsideand inside, the neck or lower end of the bulb, to which the tube a isthus firmly held.

Instead, however, of ruiming the metal both around the bulb-neck andinside the bulb, the tube a can be held in place by simply casting theguard around or' upon the exterior ofthe neck, as shown in fig. 3. Insuch case-the orifice in the bulb need be only large enough to receivethe end of the tube a, while the neck should have formed, upon itsexterior, corrugations'or anges, or any equivalent means, constituting aholding-surface for the metal guard upon the exterior ofthe neck.

The mould for casting the metal around the neck is similar to that shownin iig. 2; and the thimble or tube a is held upon a core, as'illustratedin the same figure. But in this case, as the metal does not enter theinterior ofthe bulb, the core may be solid instead of tubular.

The metal, when cast around the neck ofthe bulb, enters the corrugationsc, or surrounds the flanges, teeth, or equivalent holding-devices formedupon the exterior ofthe neck, and thus holds the tube a firmly inposition.

The tube ,'as shown in the drawings, has an internal screw-thread, withwhich thescrew-threa'ded upper end of the stem B engages. Instead,however, of employing this means for uniting the two, the stem may beforced into the tube, and held byfriction.

Between the shoulder of the stem and the tube, there may be interposed awasher or packing, (l, of suitable material, so as to insure thatperfect tightness of, the joint which is so essential to the perfectoperation of the lubricator.

vIn conclusion, I'would observe -that I do not claim forming the metalholding-button b within the bulb, as shown in figs. 1 and 2, as thatfeature has been described and claimed by me in the application abovereferred to; but

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-

An automatic lubricator, in which the bulb and the tube for holding thefeed-stein are united, by means of a guard of fusible or soft metal, oralloy, cast around the neck of the bulb, provided, upon its exterior,with corrugatious or equivalent means, forming a holding-surface for themetal, or both' around and within the bulb, substantially as'and for thepurposes sot forth.

In vtestimony whereof', I have signed my nameti this specification,before two subscribing witnesses G. IVATERS.

Witnesses EDM. F. BROWN, M. BAILEY.

